feat(core): Refactor project structure for better modularity and code organization

ts_shared/index.ts

@@ -0,0 +1,12 @@
+export const a4Height = 1122;
+export const a4Width = 794;
+export const rightMargin = 70;
+export const leftMargin = 90;
+
+import * as interfaces from './interfaces/index.js';
+export { interfaces };
+
+import * as translation from './translation.js';
+export { translation };
+
+export * from './demoletter.js';